Arduino Barcode Scanner Shield acts as Arduino Shield via 1Sheeld

Barcode Scanner library allows your phone to read 1D/2D codes and take certain actions according the readings.

Adding #define CUSTOM_SETTINGS along with #define INCLUDE_BARCODE_SCANNER_SHIELD is a key that will let you unlock BarcodeScanner shield only amongst all shields and prevent 1Sheeld library from eating your memory especially for UNO board.

Note

– Barcode Scanner support only these formats (UPC_A,UPC_E,EAN8,EAN13,CODE39,CODE93,CODE128,PDF417,QRCODE,AZTEC,ITF,ITF14,DATA_MATRIX).
– There’s an implicit delay in the app between each scan of max (2sec).
– When code first scanned Barcode scanner shield sends the first 128 character or less, while if code holds more than 128 character, then you will have to query the next characters using the query function queryNextDataBytes (explained), if less than 128 character it will all be sent once and you won’t have to query any more bytes.
– For more information about Barcode check the Wiki link.
– 2D barcodes coded to several categories for example the QR code supports (URL’s,business cards..etc) check the link here for more information, also check this link which generates most types of barcodes(1D&2D).
– This Shield is currently supported by IOS application.

 bool isNewBarcodeScanned(void)

BarcodeScanner.isNewBarcodeScanned();

bool isFullySent(void)

BarcodeScanner.isFullySent();

bool isNextDataBytesReceived(void)

BarcodeScanner.isNextDataBytesReceived();

byte getFormat(void)

Literals

byte formatType = BarcodeScanner.getFormat();

byte getCategory(void) (for 2D codes)

Literals

byte categoryType= BarcodeScanner.getCategory();

byte getDataLength(void)

byte dataLength= BarcodeScanner.getDataLength();

int getMaxDataLength(void)

int maxDataLength= BarcodeScanner.getMaxDataLength();

char * getData(void)

char * myData= BarcodeScanner.getData();

void queryNextDataBytes(byte)

BarcodeScanner.queryNextDataBytes();

void queryParameterValue(const char *) (2D code)

BarcodeScanner.queryParameterValue("tel");

void setOnNewBarcodeScanned(void (*userFunction)(byte,byte,int,char*))

BarcodeScanned.setOnNewBarcodeScanned(&newScannedFunction);
/* On new barcode scanned function. */
void newScannedFunction(byte format,byte category,int maxLength,char * data)
{
 /* Check if the code scanned is a QR code or a Data matrix code. */
 if(format == QRCODE || format == DATA_MATRIX)
 {
 /* Check if the code scanned with email category type. */
 if(category == CODE_EMAIL)
 {
 /* Terminal line for debugging. */
 Terminal.println("Entered");
 /* Query parameters from barcode scanner. */
 BarcodeScanner.queryParameterValue("mailto");
 BarcodeScanner.queryParameterValue("subject");
 BarcodeScanner.queryParameterValue("body");
 }
 }
}

void setOnNextDataResponse(void (*userFunction)(byte,char *))

BarcodeScanned.setOnNextDataResponse(&nextData);
/* On new barcode scanned function. */
void nextData(byte dataLength,char * data)
{
   Terminal.println(data);
}

void setOnParameterValueResponse(void (*userFunction)(char*,char*))

BarcodeScanned.setOnParameterValueResponse(&getParameter);
/* On new barcode scanned function. */
void getParameter(char * parameter,char * value)
{
   Terminal.println(value);
}

void setOnError(void (*userFunction)(byte))

/* Subscribe to setOnError. */
BarcodeScanner.setOnError(&errorFunction);
/* errorFunction exists under the loop function. */
/* This function will be invoked if an error occurrs.*/
void errorFunction(byte errorData)
{
 /* Switch on error and print it on the terminal. */
 switch(errorData)
 {
 case BARCODE_NOT_SUPPORTED: Terminal.println("Barcode not supported");break;
 case BARCODE_SCANNING_ERROR: Terminal.println("Barcode scanning Error");break;
 case WRONG_PARAMETER: Terminal.println("Wrong parameter");break;
 case NOT_ENOUGH_BYTES: Terminal.println("No enough bytes");break;
 case CATEGORY_NOT_SUPPORTED: Terminal.println("Category not supported");break;
 }
}